<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <script src="../jquery-2.1.1.min.js"></script>
    <script src="dropdownlist.js"></script>
    <style>
    </style>
</head>
<body>
    <select id="dropdown">
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
        <option value="4">Four</option>
        <option value="5">Five</option>
    </select>
    <script>
        $('#dropdown').dropdown();
    </script>
</body>
</html>